Tested on STEAM release v1.03.17.1781
Date: 04/12/2012 (dd/mm/yyyy)
Trainer: Hitmehard

1. Launch Trainer
2. Launch Game
3. Press Hotkeys
4. Profit

Hotkeys:

F7 - God Mode (Invincible)

F8 - Flashlight doesn't deplete

F9 - Keep on running and running

F10- Ammo doesn't deplete, still need to reload

F11- Batteries don't deplete

F12- No reloading required (works well with F10, enable both)